Created
February 5, 2016 21:08
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Short example of Flask TLS and SSE
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| """ | |
| Python 3.4.4 | |
| Flask==0.10.1 | |
| Jinja2==2.8 | |
| MarkupSafe==0.23 | |
| Werkzeug==0.11.3 | |
| cffi==1.5.0 | |
| cryptography==1.2.2 | |
| idna==2.0 | |
| itsdangerous==0.24 | |
| pyOpenSSL==0.15.1 | |
| pyasn1==0.1.9 | |
| pycparser==2.14 | |
| six==1.10.0 | |
| """ | |
| from datetime import datetime | |
| from time import sleep | |
| from flask import Flask, Response, render_template | |
| app = Flask(__name__) | |
| index_html = """ | |
| <!doctype html><html lang=en> | |
| <head> | |
| <title>SSL Stream</title> | |
| </head> | |
| <body> | |
| <h1>hello, world</h1> | |
| <ul id="events"></ul> | |
| <script> | |
| window.onload = function() { | |
| var source = new EventSource("/stream"); | |
| source.onmessage = function(e) { | |
| var newElement = document.createElement("li"); | |
| newElement.innerHTML = e.data; | |
| document.getElementById("events").appendChild(newElement); | |
| } | |
| } | |
| </script> | |
| </body> | |
| </html> | |
| """ | |
| def streamer(): | |
| while True: | |
| sleep(1) | |
| data = datetime.utcnow().strftime('%Y-%m-%dT%H:%M:%S') | |
| yield 'data: {}\n\n'.format(data) | |
| @app.route('/stream') | |
| def stream(): | |
| return Response(streamer(), mimetype="text/event-stream") | |
| @app.route('/') | |
| def index(): | |
| return index_html | |
| if __name__ == '__main__': | |
| app.run(debug=True, threaded=True, ssl_context='adhoc') |
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